Hints and Hijinx
The solo mystery game system
Campfire | An Elegant Travel System for 5E
Campfire gives you meaningful travel in 5E without getting in the way of you game.
Null
A system for breaking down systems
Paper Story
Your Mario RPG
Bastards.: Appendices A-F
Additional rules for Bastards. Pearlescent
Runt Tabletop Roleplaying System
An ultra-light RPG system for 2+ players requiring no cards or dice - just some friends and a little imagination.
SISTEMA APALABRADO
Sistema narrativo para munchkins de diccionario
Key & Token
A miniature No Dice, No Masters engine.
Tapestry SRD
Resources and guidance for creating games based on Tapestry.
Trail with No Name
Welcome to the Trail
1420 BEASTS & BARROWS
B&B/2400 hack w/ d6 dice pool
2D10 RPG
one page Creative Commons roleplaying game
Wanderlust: The Researcher
A character-creation system focused on generating research-oriented fantasy characters for use in adventure TTRPGs.
Love or World Peace?
System Agnostic TTRPG Character Value System
Wanderlust: The Traveler
A character-creation system focused on generating travel-oriented fantasy characters for use in adventure TTRPGs.
Resonances
A Roleplaying System
P2AXIS Free Roleplay
Universal guide for minimalist, FKR-style games.
Byakhee
Ein kleines System für die Großen Alten
Dice Pile System
Sistema generico gratuito. / Free generic system.
Dark War
Generic role-playing game for survival scenarios in war settings, based on Cthulhu Dark
Two Days Tops
A one-page RPG for open-world campaign play
Crows - Tabletop Role-playing Game
The evergrowing, free D20 tabletop RPG
Alphabet Soup Universal Roleplaying System
Simple system using alphabet dice